The Chatillon TCD did not work very well in measuring the force generated by the pendulum. We figured out why -- it is meant to measure tension and compression, not impulses. It does not read in measurements at a high enough frequency to measure the impact force of our pendulum.
It also seems to be that FSR's may not have a high enough frequency of measurement as well. We will still connect it to an ADC, and try it out to see what happens.
Alternate solutions include using piezoelectric sensors or accelerometer -- more on that later.